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03664

Sigma-Aldrich

Ethylenediaminetetraacetic acid tripotassium salt dihydrate

BioUltra, ≥99.0% (KT)

Synonym(s):

EDTA tripotassium salt, Edathamil, Tripotassium ethylenediaminetetraacetate dihydrate

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About This Item

Linear Formula:
(KOOCCH2)2NCH2CH2N(CH2COOK)CH2COOH · 2H2O
CAS Number:
Molecular Weight:
442.54
Beilstein/REAXYS Number:
6762497
MDL number:
UNSPSC Code:
12352116
PubChem Substance ID:
NACRES:
NA.25

product line

BioUltra

Quality Level

assay

≥99.0% (KT)

form

powder or crystals

reaction suitability

reagent type: chelator

impurities

insoluble matter, passes filter test

pH

7.0-9.0 (25 °C, 0.1 M in H2O)

mp

182 °C (dec.) (lit.)

solubility

H2O: 0.1 M at 20 °C, clear, colorless

anion traces

chloride (Cl-): ≤50 mg/kg
sulfate (SO42-): ≤500 mg/kg

cation traces

Al: ≤5 mg/kg
As: ≤0.1 mg/kg
Ba: ≤5 mg/kg
Bi: ≤5 mg/kg
Ca: ≤20 mg/kg
Cd: ≤5 mg/kg
Co: ≤5 mg/kg
Cr: ≤5 mg/kg
Cu: ≤5 mg/kg
Fe: ≤5 mg/kg
Li: ≤5 mg/kg
Mg: ≤5 mg/kg
Mn: ≤5 mg/kg
Mo: ≤5 mg/kg
Na: ≤2000 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Sr: ≤5 mg/kg
Zn: ≤5 mg/kg

λ

0.1 M in H2O

UV absorption

λ: 260 nm Amax: 1.5
λ: 280 nm Amax: 0.05

SMILES string

[K+].[K+].[K+].[H]O[H].[H]O[H].OC(=O)CN(CCN(CC([O-])=O)CC([O-])=O)CC([O-])=O

InChI

1S/C10H16N2O8.3K.2H2O/c13-7(14)3-11(4-8(15)16)1-2-12(5-9(17)18)6-10(19)20;;;;;/h1-6H2,(H,13,14)(H,15,16)(H,17,18)(H,19,20);;;;2*1H2/q;3*+1;;/p-3

InChI key

MAPFUJCWRWFQIY-UHFFFAOYSA-K

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Application

Ethylenediaminetetraacetic acid tripotassium salt dehydrate can be used to study chelators, biochemicals and reagents. EDTA tripotassium salt has been used in a study to assess the safety of EDTA and HEDTA ingredients in cosmetic formulations.
Used to eliminate inhibition of enzyme catalyzed reactions due to traces of heavy metals

pictograms

Health hazardExclamation mark

signalword

Warning

hcodes

Hazard Classifications

Acute Tox. 4 Inhalation - STOT RE 2 Inhalation

target_organs

Respiratory Tract

wgk_germany

WGK 2

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

dust mask type N95 (US), Eyeshields, Gloves


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